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Finding the Fourth Proportional to 60,805.20, 91,239.84 and 43,149.88

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Solution

The fourth proportional to 60,805.20, 91,239.84 and 43,149.88 is: 64,747.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,805.20 : 91,239.84 = 43,149.88 : x
  2. Step 2: Convert to fraction form
    60,805.20/91,239.84 = 43,149.88/x
  3. Step 3: Cross multiply
    60,805.20x = 91,239.84 × 43,149.88
  4. Step 4: Simplify right side
    60,805.20x = 3,936,988,147.22
  5. Step 5: Solve for x
    x = 3,936,988,147.22/60,805.20
  6. Step 6: Final answer
    x = 64,747.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.